Moreover, the additional exogenous variable (number of trip chains) has a positive Docetaxel Microtubule Formation inhibitor effect on commute time and mode choice, and the number of trips exerts a positive influence on commute time. Figure 1 shows that subsistence activity of outside commuters makes up 94.2% of the total; the trips and trip chains are increased along with increasing commute trips, so the commute time is extended as well. 6. Conclusions and Recommendations Based on the household survey data in the historic district of Yangzhou, China, this study explored the relationships between the individual and household attributes and commuters’ travel characteristics. First, commuters were categorized

into two groups according to their working locations, which were the commuters in the historic district and the commuters out of the historic district. Then, the SEM models were estimated separately for the two commuter groups.

The study analyzed the influences of individual and household attributes on the travel characteristics of different groups, which are specified by the commute time, duration of the commuting, commute trip number, number of trips on a working day, number of trip chains, the numbers of three typical home-based trip chains, and travel mode. The comparison of the two groups showed that the commuters within historic district traveled more frequently than those outside of the district, especially in the daily trip number and trip chain times. Most commuters in the historic district have shorter trips for work, and thus they are more inclined to use nonmotorized mode. As a long commute distance for commuters out of the district, mostly they follow the trip chains named “HWH,” and they are more likely to travel by automobile. With the transition of industries

in Yangzhou, more employment chances are provided in the areas out of the historic district, and more people will travel long commute trips by automobile, which will result in severe congestions on roads. Therefore, the primary thing for the inside commuters is to improve the nonmotorized travel Cilengitide conditions. But for the outside commuters the most needed thing is to improve the service quality of public transpiration, which is of significance for the improvement of transit usage. The SEM was applied to analyze the influencing factors on the travel characteristics for the inside and outside commuters. The analysis results were summarized into four points: first, the age and household size have remarkable influences on the travel characteristics of the inside commuters, while they have no significant influences on that of the outside commuters. Second, in the model for inside commuters, occupation has a significant effect on the travel mode.